巨厚砂砾岩地层条件下高压线塔压煤开采与变形控制

Deformation Control of High-Voltage Transmission Line Tower in Coal Mining under the Conditions of Huge Thick Sand-Conglomerate Strata

摘要: 玉华煤矿上覆岩层存在厚度达265~309 m的巨厚洛河组砂砾岩层，根据地表移动实测数据拟合分析，在2个长壁工作面综放开采条件下，地表下沉系数仅为0.2。针对玉华煤矿巨厚砂砾岩地层的特殊条件，为解决四盘区中部存在330 kV高压线塔、影响盘区开拓布局和正常开采这一问题，提出了全部开采、局部限厚开采、条带开采等三个开采方案并进行了对比分析，采用概率积分法计算了不同开采方案对高压线塔的变形控制效果，确定了合理的开采方案。

Abstract: With the existence of huge thick sand-conglomerate stratua in the overburden of Yuhua Coal Mine, according to the fitting analysis of measured data of surface movement, the coefficient of surface subsidence is only 0.2 under the condition of fully mechanized top-coal caving mining in two long- wall working faces. In view of the special conditions of the huge thick sand-conglomerate strata in Yuhua Coal Mine, in order to solve the problems of 330 kV high-voltage line tower passing through the middle of the No. 4 panel area, which affect the development layout and normal mining, three mining schemes are presented and compared, i.e. full-thickness mining, partial-thickness mining and strip mining. The probability integral method is used to calculate the surface movement and deformation in three coal mining schemes. Finally best coal mining scheme is determined.