综放采场走向压力分布规律及终采线位置确定

为合理确定综放采场工作面终采线的位置,以谢桥煤矿C_(13-1)煤一综放工作面为研究背景,采用相似材料模拟试验和现场测试,从煤层顶板运动、巷道煤层受力和位移、巷道深部位移、轨道上山支架受力、巷道支架受力和变形、工作面周期来压等方面,全面分析了综放采场走向围岩压力分布规律。结果表明,围岩压力峰值位置平均值为14．4m,超前影响距离平均值为66．8 m,在工作面前方平均29．2 m处,围岩矿压显现由缓和趋向剧烈,并将终采线位置确定在离轨道上山30 m处,比预先按传统设计的50 m缩短了20 m留设煤柱,经济效益十分显著。

Strike surrounding rock pressure distribution law and terminal mining line location setting for fully mechanized top coal caving mining face

In order to rationally set the location of the terminal line for fully mechanized top coal caving mining face,and taking a fully mechanized top coal caving mining face in C_(13-1) seam of Xieqiao Mine as the research object,a simulation test and a site test with simula- ted material were conducted from the roof movement,deep displacement of the gateway,support loadings in the railway upward gateway, support loading and deformation in the gateway,periodical pressure in the coal mining face and others.The paper analyzed the pressure distribution law of the strike surrounding rock of the fully mechanized top coal caving mining face.Resuhs showed that the average value at the pressure peak location of the surrounding rock was 14.4 m and the average value of the pilot distance influenced was 66.8 m.At the average 29.2 m location in front of the coal mining face,the strata pressure behave in the surrounding rock was changed from a relaxation to serious.The location of the terminal mining line was rationally set at a distance of 30 m to the railway line upward gateway,which was 20 m shorter than 50 m distance to set the designed coal pillar.Therefore the economic benefit was obvious.