大平矿特厚煤层综放工作面水下开采安全性评价  

Safety Evaluation of Mining in Fully Mechanized Top Coal Caving Face under Super Thick Seam Reservoir in Daping Coal Mine

作　　者：张峰 秦洪岩 题正义[3] Zhang Feng;Qin Hong-yan;Ti Zheng-yi(Department of Mining Engineering,Shanxi Institute of Technology,Yangquan 045000,China;Safety Engineering Institute,North China Institute of Science and Technology,Beijing 101601,China;School of mining,Liaoning Technical University,Fuxin 123000,China)

机构地区：[1]山西工程技术学院采矿工程系,山西阳泉045000 [2]华北科技学院安全工程学院,北京101601 [3]辽宁工程技术大学矿业学院,辽宁阜新123000

出　　处：《煤》2020年第8期1-4,34,共5页Coal

基　　金：国家自然科学基金资助项目(51704148)。

摘　　要：为了确保大平矿特厚煤层水库下开采的安全性问题,依据待采工作面的地质条件和其他采区已采工作面的实测数据,构建了该井田范围内的水下开采安全性的判定准则,结合3DEC数值模拟得到的导水裂隙带高度,判定水下开采的安全性。以S2S9综放工作面为例,依据判定准则得到的最小保护层厚度为58.84 m,数值模拟得到的导水裂隙带高度为180.6 m,根据煤层最小埋深和含水层厚度得到防水煤岩柱的高度为552.73 m,与导高之间的差值为372.13 m,大于能够安全隔水的最小保护层厚度58.84 m,而且还大于已采面最大的保护层厚度333.04 m,说明S2S9综放工作面水下开采是安全可行的。In order to ensure the safety of mining under the reservoir in Daping Coal Mine,according to the geological conditions of the working face to be mined and the measured data of the working face in other mining areas,the judgment criteria of the safety of underwater mining within the scope of the well field are established,combined with 3 DEC numerical simulation,the height of water conducting fracture zone is determined to determine the safety of underwater mining.Taking S2 S9 fully mechanized top coal caving face as an example,the minimum protective layer thickness is 58.84 m according to the judgment criteria,the height of the water conducting fracture zone is 180.6 m according to the numerical simulation,the height of the waterproof coal pillar is 552.73 m according to the minimum buried depth of the coal seam and the thickness of the aquifer,the difference between the waterproof coal pillar and the guiding height is 372.13 m,which is greater than the minimum protective layer thickness of 58.84 m that can safely separate water,and also greater than the mined face.The maximum thickness of protective layer is 333.04 m,which shows that the underwater mining of S2 S9 fully mechanized caving face is safe and feasible.

关 键 词：判定准则 数值模拟 导水裂隙带 防水煤岩柱高度 保护层厚度 

分 类 号：TD823.97[矿业工程—煤矿开采]