东大煤矿底抽巷穿层定向长钻孔抽采效果验证方法_中国煤炭行业知识服务平台

东大煤矿底抽巷穿层定向长钻孔抽采效果验证方法

Title

Verification Method for the Effect of Through Strata Directional Long Borehole Extraction in the Bottom Drainage Roadway of Dongda Coal Mine
作者

晁志国
Author

Chao Zhiguo
单位

晋能控股装备制造集团
Organization

Jinneng Holding Equipment Manufacturing Group
摘要

为消除东大煤矿试验煤层的瓦斯突出危险性,以瓦斯抽采率和抽采流量为基础,推导瓦斯抽采效果计算方法,通过监测3组钻孔的抽采流量,计算了30d内的瓦斯抽采率。数据分析表明:抽采流量随抽采时间呈现指数衰减形式,3组钻孔的瓦斯抽采率在监测时间内均满足了瓦斯防治标准。
Abstract

To eliminate the risk of gas outburst in the experimental coal seam of Dongda Coal Mine, a calculation method for gas drainage effect is derived based on gas drainage rate and drainage flow rate. By monitoring the drainage flow rate of three sets of boreholes, the gas drainage rate within 30 days is calculated. The data analysis shows that the drainage flow rate decreases exponential decay with the drainage time, and the gas drainage rates of the three groups of boreholes meet the gas prevention and control standards within the monitoring time.
关键词

底抽巷定向长钻孔抽采流量抽采率
KeyWords

bottom extraction roadway; directional long borehole; drainage flow rate; drainage rate
DOI

10.3969/j.issn.1005-2801.2023.09.042