短壁矸石胶结充填开采技术与应用

发布时间：2018-05-05 13:07

本文选题：矸石胶结 + 连采连充　；参考：《煤炭学报》2017年S1期

【摘要】：针对我国煤矿"三下"压煤量大、村庄搬迁困难,长壁充填开采投资大、地质条件适应性差、采充相互干扰等问题,通过理论分析、室内试验、数值模拟和现场实测等手段,提出了短壁矸石胶结充填技术,研究了材料配比、支巷参数、围岩应力场演化和地表变形规律,主要结论如下:(1)充填浆料最佳配比为1∶1.5∶4,与矸石1∶2混合后充填支巷;(2)基于极限强度理论确定支巷最佳宽度为5 m;(3)数值模拟表明:开采过程中煤壁超前支承压力峰值为13.1 MPa,开采奇数巷时充填体受力1.6 MPa,开采偶数巷时受力10.4 MPa,顶板塑性区5 m,底板破坏带深度5 m,呈现W-波浪形分布;(4)现场实测表明:支巷超前支撑压力为19.7 MPa,位于支巷前端4.6 m,顶底板最大移近量116.3 mm;顶板在0~5.7 m范围内产生少量断裂微裂隙,离层不明显,只发生弯曲下沉,不存在垮落带;(5)充填材料来源广、矸石不外运,实现了采充平行作业。该方法在内蒙古裕兴煤矿得到了广泛的应用,有效缓解了长壁充填开采带来的弊端,以较小吨煤成本,获得较大的经济和环境效益。
[Abstract]:In view of the problems of "three lower" coal pressure, difficult relocation of villages, large investment in long wall filling mining, poor adaptability of geological conditions, mutual interference between mining and filling, and so on, through theoretical analysis, laboratory test, numerical simulation and field measurement, etc. The cemented filling technology of short wall gangue is put forward. The material ratio, the parameters of branch roadway, the evolution of surrounding rock stress field and the law of surface deformation are studied. The main conclusions are as follows: (1: 1: 1) the optimum ratio of filling slurry is 1: 1.5: 4, and after mixing with gangue at 1:2, the filling branch roadway Shuiguo 2) based on the limit strength theory to determine the optimum width of the branch roadway is 5 m ~ 3) numerical simulation shows that the coal wall in the mining process is ahead of time. The peak value of supporting pressure is 13.1 MPA, the loading of filling body is 1.6 MPA when mining odd number roadway, the force is 10.4 MPA when mining even number roadway, the plastic zone of roof is 5 m, the depth of floor damage zone is 5 m, and the distribution of W-wave shape is presented. The pressure is 19. 7 MPA, which is located at the front end of the branch roadway at 4. 6 m, the maximum displacement of the top and bottom plate is 116.3 mm, and the roof produces a small amount of fracture microcracks in the range of 0 ~ 5. 7 m. The separation layer is not obvious, only bends and sinks occur, there is no caving zone, the filling material sources are wide, the gangue is not transported out, so the parallel mining and charging operation is realized. The method has been widely used in Yuxing Coal Mine, Inner Mongolia, which effectively alleviates the drawback brought by long wall filling mining, and obtains greater economic and environmental benefits with lower coal cost per ton.
【作者单位】：内蒙古裕兴矿业有限公司;山东科技大学矿业与安全工程学院;山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地;
【基金】：国家自然科学基金资助项目(51574159) 中国博士后科学基金资助项目(2015M572068) 山东省科学基金资助项目(ZR2014EEM001)
【分类号】：TD823.7

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