Research of Increase Gas Drainage Efficiency with Slotted Charge Blasting

摘要：

Proposed the method of slot cartridge hole blasting to improve the efficiency of gas drainage. First, by the mean of numerical calculation, we conducted the two-dimensional simulation study on the X-shapeslotted charge blasting in the coal. It was found that along the direction of the slot the perforative main crack formed, while in the other direction a dense network of secondary cracks formed, which improved the fluidity of the gas in the coal. Followed by a three-dimensional simulation study, it was found that near the gas drainage holes, the effective stress was greater than 40 MPa, while in the vicinity of free surface the stress wave attenuated severely. On the one hand it ensures of enough cracks in the coal, which facilitate gas emission;on the other hand it ensures the intactness of free surface in the blast, which enhances the security of gas drainage.

关键词： gas drainage, slotted charge blasting numerical simulation stress wave crack develop

作者: YANG Ren-shu YANG Guo-liang WANG Ping-hu CHE Yu-long

作者单位: State Key Lab of GeoMechanics and Deep Underground Engineering China University of Mining & Technolo Shine Coal Mine Jincheng Anthracite Coal Mining Group Corporation Ltd Jincheng 048205,Shanxi,China

会议类型: 国际会议

会议名称: 2010 International Conference on Digital Manufacturing and Automation(2010 数字制造与自动化国际会议 ICDMA 2010)

会议地点: 长沙

会议语种:英文

页码: 174-177

在线出版日期: 2010-12-18（万方平台首次上网日期，不代表论文的发表时间）