The impact of open-air deep-hole blasting design on residential areas

Study on parameter optimization of deep hole cumulative …

2022-3-24 · The positive effects of deep hole cumulative blasting parameter optimization on the pressure relief and permeability enhancement of a high gas and low permeability coal seam were determined, which ...

(PDF) Impact of deep-hole opencast blasting on the …

2009-7-1 · The paper discusses a case study in India on the impact of deep-hole blasting in Ramagundam Opencast Project - III on the stability of various water dams of GDK-6B Incline coal mine operating in ...

Study of Two-Step Parallel Cutting Technology for Deep …

2021-5-7 · Study of Two-Step Parallel Cutting Technology for Deep-Hole Blasting in Shaft Excavation Renshu Yang,1,2,3 Changda Zheng,1,3 Liyun Yang,1,3 Jinjing Zuo,1,3 Tonglei Cheng,1,3 ... area was 300mm, and the design diameter was 120mm (Figure7). 4.2.SpecimenMaterials. ematerialusedinthespecimen was gypsum, which was mixed evenly …

Hard Roof Pressure Relief Technology by Deep-hole …

Abstract: The pressure relief technology of deep hole cut blasting at comprehensive mechanized mining face can control the roof disaster produced by large step distance of first breaking down and weaken a large area caving of roof. When the extraction work face ...

Hard rock deep hole cutting blasting technology in vertical …

Using the traditional cutting blasting technology in vertical shaft construction has some features, e.g. slows driving speed, gangue with large volume and throwing high. Moreover, large explosive charge initiation has a serious influence on freezing pipes and freezing wall. In this study, the periphery hole charge and charge structure was optimized, and the blasting model of the …

Study on Stability Effect of Large Diameter Deep Hole …

In order to study the impact of blasting vibration on surrounding rock of mining tunnel by large diameter deep hole blasting in mining operation.The FLAC3D 3.0 was chosed as basic computing tools based on the actual blasting vibration loading om the stress and deformation of mining tunnel,the condition and its changes of stress,deformation and plastic zone of surronnding …

Blast Design for Controlling Some of Environmental …

To meet the stated objectives, a field study was conducted on sandstone overburden formation of an opencast coal mine of BCCL, a subsidiary of Coal India Ltd. (CIL). The mine is being worked by mechanized drilling and deep hole blasting method. Crawler mounted DTH pneumatic drill of 150mm diameter is being used to drill blast holes.

A Preliminary Study on the Design Method for Large …

Presplit blasting can reduce vibration and back impact induced by cast blasting, thus resulting in a smooth bench slope. ... DOAJ is a community-curated online directory that indexes and provides access to high quality, open access, peer-reviewed journals. ... A Preliminary Study on the Design Method for Large-Diameter Deep-Hole Presplit ...

Impact of deep-hole opencast blasting on the stability of …

Made available by U.S. Department of Energy Office of Scientific and Technical Information ...

DESIGN AND APPLICATION OF AIR DECKS IN SURFACE …

2008-6-1 · 3) demonstrate sufficient explosives savings to offset the cost of the air decking device 4) demonstrate the design and implementation of air decks for wall control In all tests involving top air decks, surface fragmentation with properly designed and implemented air decks was equal to or better than that achieved with normal practice.

Assessing and controlling of boulder deep-hole blasting …

2021-4-6 · Xie CY, Luo ZQ, Jia N, Xiong LX, Cheng GH. Dynamic effects of open blasting vibration on adjacent buildings and measures for vibration reduction. Explos Shock Waves. 2013;32:187–93. Google Scholar Liu ZF, Zhang GP, Wang BH. Deep-hole blasting vibration and drop shock test and analysis of measures. Blasting. 2010;27:107–10.

Hard Roof Pressure Relief Technology by Deep-hole Blasting

The pressure relief technology of deep hole cut blasting at comprehensive mechanized mining face can control the roof disaster produced by large step distance of first breaking down and weaken a large area caving of roof. When the extraction work face goes through the high danger area of impact,the deep-hole blasting technology may release elastic energy stored in hard …

Study on the technology of enhancing permeability by …

The influence radius of single-hole blasting was 3.1 m, the hole diameter of double-hole blasting was 113 mm, the hole spacing was 5.5 m, and the delayed blasting time was 25 ms. According to the numerical simulation results, the determined parameters were tested on the working face of the 1312 transportation roadway in coal seam #3 of the ...

Impact on Adjacent Buildings of Open Deep Hole Blasting ...

2012-6-29 · Impact on Adjacent Buildings of Open Deep Hole Blasting Vibration in Biesikuduke Open PitCN Cui Hansong Yang Jun Xu Zhenyang Liu Jie (State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing,100081)

Experimental study and application of medium‐length …

2020-1-10 · When the medium‐length hole blasting of 1.8 to 2.5 m is carried out, the existing hole cut blasting methods have poor applicability to roadway blasting excavation of coal mines with complicated geological conditions. 2 Therefore, it is important to study the blasting mechanism of the medium and deep hole cutting under different conditions and ...

Dynamic effects of open blasting vibration on adjacent …

In order to solve efficiently the problem that adjacent buildings might be destroyed by an open pit deep hole blasting vibration,the blasting vibration was firstly measured in real-time two times by using a blasting vibration signal measuring system in an open limestone site.The measured data under the original blasting parameters of the blasting vibration were processed with the one …

Parameter Optimization and Fragmentation Prediction of …

2022-6-21 · For San-Xin gold and copper mine, deep blasting large block rate is high resulting in difficulty in transporting the ore out; secondary blasting not only increases blasting costs but is more likely to cause the top and bottom plate of the underground to become loose causing safety hazards. Based on the research background of Sanxin gold and copper mine, deep hole …

Permeability enhancement of deep hole pre-splitting …

2018-6-28 · To solve the hidden danger of high methane and low permeability gas in the coal mining process, potentially affecting the safety production in an orderly way, we propose the use of deep hole blasting technology to improve the permeability of the coal seam gas drainage, increase the quantity and rate of extraction, and reduce methane output. Taking the geological …

Parameters optimized design of open deep-hole bench …

2016-4-1 · Download Citation | Parameters optimized design of open deep-hole bench surface blasting | Toe rock and boulders are important evaluation indicators of open-pit mine blasting. Based on the rock ...

IOP Conference Series: Earth and Environmental Science …

Optimal Design of Presplit Blasting Network of Deep Concave Open-Pit Mine Slope with Heterogeneous Complex Rock Mass Yajun Chen1, Juanjuan Zhao1 2and De Cao 1 College of Mining Engineering and Geology, Xinjiang Institute of Engineering, Urumqi 830091, China 2 Beishan Open-Pit Coal Mine, Qitai County Changji Prefecture Xinjiang 831800 China

NEW DEVELOPMENT ON ENGINEERING BLASTING ...

NEW DEVELOPMENT ON ENGINEERING BLASTING(). NEW DEVELOPMENT ON ENGINEERING,☞,、!. NEW DEVELOPMENT ON ENGINEERING .,,!.

Impact of Deep-hole Opencast Blasting on the Stability of …

Sawmliana, C and Singh, R.K. and Pal Roy, P. (2009) Impact of Deep-hole Opencast Blasting on the Stability of Water Dams of a Close-by underground coal mine ? Synopsis. Journal of

Study on Stress Relief of Hard Roof Based on Presplitting …

With the combination of the two blasting methods, the end-mining coal pillar size of Luning Coal Mine can be reduced to 60 m. The method combining presplitting and deep hole blasting can effectively reduce the end-mining coal pillar size and reduce the impact of mining on the deformation of the dip roadway. Record URL:

A Preliminary Study on the Design Method for Large …

2019-11-25 · Presplit blasting can reduce vibration and back impact induced by cast blasting, thus resulting in a smooth bench slope. To design reasonable presplit blasting parameters, this research investigated the formation of presplit faces based on the explosion mechanics and revealed the cracking mechanism of presplit blasting. According to the stress distribution in the …

Study on the technology of enhancing permeability by …

2021-10-13 · The positive effects of deep hole presplitting blasting permeability enhancement technology on the pressure relief and permeability enhancement of a low pressure and high gas coal seam were ...

Optimization of Close-Range Blasting Design with …

2020-8-31 · Optimization of Close-Range Blasting Design with Vibration-Damping and Speed-Reduction for Open-Pit Mine in an Arid Region ... it is recognized that deep-hole blasting of heterogeneous rock mass will cause vibration damage to ground building structures.

Numerical Study on Impact Characteristics of Filling …

deep blast hole and big quantity of one-time explosive, in order to prevent deleterious effects on filling body and stope caused by blasting, it is necessary to control the blasthole boundary line and blasting vibration effect effectively [3-4]. An underground lead-zinc mine adopts large diameter deep hole stopping and subsequent filling

(PDF) The Mechanism and Application of Deep-Hole …

The mechanism of preventing rockburst through deep-hole precracking blasting was studied based on experimental test, numerical simulation, and …

The movement process and length optimization of deep …

2021-10-1 · Deep-hole bench blasting method and mixed ANFO explosive were used for blasting construction. A borehole layout scheme of quincunx was chosen and a total of 3 rows boreholes were drilled in the blasting area, with 8 boreholes in each row. During drilling, it was found that there was a muddy layer on the wall surface of individual boreholes.