Based on the case of coal mining in lower coal seams under water pressure and floor strengthened in Gequan Mine and also on the basis of changing strain monitoring values obtained at varied depths in the floor of the mining site that change with the advance of coal face,this paper provides an indirect analysis of the damages caused by mining to the coal seam floor strata of its first coal face.It is determined that the depth of the damages in the floor caused by coal mining is 12.5m.

葛泉矿东井9#煤底板下的本溪灰岩含水层和存在导升通道的奥灰含水层给矿井的安全开采带来很大的安全隐患。通过实践证明,使用成本低廉的黏土水泥浆改造煤层底板后,可以达到安全生产的目的。文章详细介绍了煤层底板黏土水泥浆改造技术在葛泉矿东井9#煤开采中的成功应用。

在岩层裂隙注浆堵水方面,CL-C型粘土水泥浆与单液水泥浆相比,具有成本低、悬浮性好、抗渗性好、浆液扩散距离远、注浆堵水效果好等优点.葛泉煤矿东井部分9号煤层底板防突水注浆改造工程中,注浆材料选用了CL-C型粘土水泥浆,取得了很好的效果.该浆液在煤层底板防突水注浆改造工程中,可以广泛推广应用.

探地雷达在地质勘察中有着较高的分辨率,而绕射波将会对雷达剖面产生严重的影响,甚至扭曲地质特征,因而降低了雷达资料的分辨率。从探地雷达和绕射扫描偏移叠加的基本原理出发,通过对探地雷达在试验槽上获得的资料进行偏移绕射处理的前后对比,说明绕射偏移处理能够实现反射波的归位,绕射波收敛,从而为解释提供依据并提高了解释精度。

根据葛泉矿1192工作面的实际情况,利用应力应变观测和注水试验对工作面底板的最大破坏深度进行探测.结合葛泉矿水文地质条件分析结果及底板探测结果,利用突水系数法对工作面底板的突水危险性进行分析,为葛泉矿9#煤的安全开采提供科学依据.

In order to ascertain any water accumulated zone in the goaf which was in the front of the gateway heading face,to remove the accumulated water would bring the potential safety dangers to the mine production and the paper provided the conception of mine transient electromagnetic method to pilot explore the taper space of the gateway heading face.The mine transient electromagnetic method and the three points and three poles pilot exploration methods were applied to survey the geological conditions in front of the gateway heading face.The results showed that the two exploration methods could have an obvious reaction in existing of the goaf water accumulated area in front of the gateway heading and the three points and three poles pilot exploration method could resolve two different goaf water accumulated areas.The mine transient electromagnetic method could display a low resistance area with a large area.In comparison with the working procedures and exploration results of the two pilot exploration methods,the mine transient electromagnetic method could be more suitable for the pilot exploration work of the modern coal mine production.

在深入分析采区水文地质条件基础上,利用大青灰岩含水层放水试验资料,建立了采区地下水系统的三维水文地质模型,采用Visual MODFLOW三维地下水模拟软件,对不同水平的疏降水量进行了预计,为矿井水防治提供了可靠依据.

The age of coal-bearing stratum of Wangxidong used to be regarded as Jurassic system . According to the plant fossil and sporopollen analysis , it should be Upper Carboniferous or Lower Triassic,it offers factual data for the bound of coal-bearing stratum in North China.