CAJ | 학술논문

急斜特厚煤层水平分段综放(Horizontal Section Top-coal Caving，HSTCC)工作面覆层结构稳定性预测对安全开采至关重要。以乌鲁木齐矿区急斜特厚煤层安全开采为目标，采用理论分析、数值计算和现场探测等综合方法，揭示了HSTCC条件下覆层类椭球体结构形成过程与局部化动态演化规律。研究表明：急斜特厚煤层水平分段综放开采工作面覆层垂向变形演化非对称趋势显著，顶煤与上覆残留煤矸复合形成非对称“拱结构”并演化为典型倾斜椭球体结构；拱角与拱顶煤岩滑落失稳，造成工作面局部压力畸变并诱发动力学灾害。这对急斜特厚煤层覆层结构和高度留设设计和灾害防治具有指导作用。
급사특후매층수평분단종방(Horizontal Section Top-coal Caving，HSTCC)공작면복층결구은정성예측대안전개채지관중요。이오로목제광구급사특후매층안전개채위목표，채용이론분석、수치계산화현장탐측등종합방법，게시료HSTCC조건하복층류타구체결구형성과정여국부화동태연화규률。연구표명：급사특후매층수평분단종방개채공작면복층수향변형연화비대칭추세현저，정매여상복잔류매안복합형성비대칭“공결구”병연화위전형경사타구체결구；공각여공정매암활락실은，조성공작면국부압력기변병유발동역학재해。저대급사특후매층복층결구화고도류설설계화재해방치구유지도작용。
It is crucial to predict the structure stability of overlying strata in steeply inclined and extra thick coal seams applying horizontal section top-coal caving (HSTCC) method. In this paper, aimed at safe miming in steeply inclined and extra thick coal seams of Urumqi mine region, the formative pro-cess and dynamical evolutionary regularity of ellipsoid-style structure of overlying strata in HSTCC condition were studied by using theoretical analysis, numerical computation and field monitoring. The results show that the non-symmetrical trend of vertical deformation is remarkable at HSTCC working face of steeply inclined and extra thick coal seam. Meanwhile, the non-symmetrical arch can be formed due to the composition of top-coal and residual overlying gangue. Sequentially the unique and steep el-lipsoid-style structure will be formed dramatically. Finally, the coal-rock mass in the arch angle and apex is slided, and causes the distortion of local rock pressure, even induces dynamic hazards around working face. The results can provide guidance for the design of strata structure and height, and the prevention of dynamic hazard in steeply inclined and extra thick coal seams.