摘要
松软低透气性煤层瓦斯治理遇到了技术瓶颈,借助地面压裂对煤层增透的优势来改善井下瓦斯抽采效果是一种解决思路。为研究地面压裂对井下瓦斯抽采的影响,基于地面微震监测对压裂裂缝扩展影响范围进行预测,考察了压裂影响区内外的瓦斯含量、涌出量、煤层透气性、抽采效果、防突指标及掘进速度等参数。研究结果表明:裂缝扩展范围大致是以主裂缝为长轴的椭圆,地面压裂对井下抽采的影响具有时效性,井下抽采滞后地面压裂的时间越短,压裂对抽采的促进作用越明显。
Gas control in soft and low permeability coal seam has encountered technical bottlenecks. It is a solution to improve the effect of underground gas drainage by taking advantage of ground fracturing to enhance the permeability of coal seam.In order to explore the influence of ground fracturing on underground gas drainage,the influence range of fracture expansion was predicted based on ground microseismic monitoring,the parameters such as gas content,gas emission,permeability of coal seam,drainage effect,index of outburst prevention and tunneling speed were investigated. The results show that the range of fracture expansion is approximately ellipse with the main fracture as the long axis,and the effect of ground fracturing on underground drainage is timeliness,the shorter the lag time of underground drainage behind ground fracturing,the more obvious the promoting effect of fracturing on drainage.
作者
马钱钱
MA Qianqian(CCTEG Chongqing Research Institute,Chongqing 400037,China;State Key Laboratory of the Gas Disaster Detecting,Preventing and Emergency Controlling,Chongqing 400037,China)
出处
《矿业安全与环保》
北大核心
2019年第2期107-110,共4页
Mining Safety & Environmental Protection
基金
国家科技重大专项(2011ZX05063)
关键词
松软煤层
低透气性
地面压裂
抽采效果
压裂影响区
时效性
soft coal seam
low permeability
ground fracturing
drainage effect
fracturing effect area
timeliness
