榆神矿区浅埋煤层多重水体下大采高综采水害影响评价  

Evaluation of Water Disaster Influence of Fully Mechanized Ming with Multiply Water Body in Shallow of Yushen Mine Area

作　　者：郭守泉[1,2] 宋业杰[1,2] GUO Shou-quan;SONG Ye-jie(Coal Mining & Designing Department, Tiandi Science & Technology Co., Ltd., Beijing 100013, China;Mining Institute, China Coal Research Institute, Beijing 100013, China)

机构地区：[1]天地科技股份有限公司开采设计事业部,北京100013 [2]煤炭科学研究总院开采研究分院,北京100013

出　　处：《煤矿开采》2018年第6期117-121,共5页Coal Mining Technology

基　　金：国家自然科学基金青年基金资助(51704161)

摘　　要：榆神矿区3煤顶板多重水体并存,对区内浅埋深厚煤层开采构成了水害威胁。以榆神矿区某矿为例,煤层顶板赋存有3类共6重水体,通过分析覆岩水体的赋存条件,确定了不同水体的富水性特征。基于3煤覆岩结构和类似条件矿井开采实践,预计了薄基岩厚土层条件下3煤7m大采高综采的覆岩破坏高度,计算了不同类型安全煤岩柱的尺寸。根据覆岩水体的富水性特征和空间分布,分析了不同水体对3煤大采高综采的水害影响程度,得出基岩风化带含水层、顶板基岩含水层和烧变岩含水层对3煤开采构成直接充水影响;黄土孔隙裂隙含水层对3煤开采构成溃砂影响;萨拉乌苏组含水层、地表十八墩河对3煤开采不构成直接充水影响。为确保安全,在3煤开采前须对基岩风化带含水层局部富水性较好的区域提前疏放,对烧变岩含水层留设20m的侧向防隔水煤岩柱。Multiply water bodies existed in coal seam of Yushen coal mine area, and within the area the thick coal seam in shallow mining was influenced by the water bodies. It taking one coal mine of Yushen mine district as an example, in total six water bodies as three kinds existed in roof, the watery of different water body was confirmed based on occurrence condition of overburden body. Based on similar mining situation and overlying strata structure of the third coal seam, and then overburden failure height of fully mechanized coal mining with mining height 7m under thin base rock and thick soil layer was predicted, and different safety coal pillar sizes were also evaluated. Water disaster influence of different water bodies to mining were analyzed based on overburden watery and spatial distribution, and then directly influence that water filling to mining were obtained, which include weathering zone aquifer base rock, aquifer of roof base rock and burnt rock aquifer. Sand inrush induced by loess pore and fracture aquifer to mining of No. 3 coal seam, directly water filling influence to No. 3 coal seam mining by Salawusu group aquifer and Shibadun river would not appeared. So some rich water region of base rock weathering zone should be drained before mining, lateral waterproof coal and rock pillar with size 20m in burnt rock zone should be retained.

关 键 词：浅埋煤层 多重水体 大采高综采 薄基岩 水害评价 

分 类 号：TD745.21[矿业工程—矿井通风与安全]