综采工作面三角区悬顶的控顶技术

Roof Control Technology for Suspended Roof in Triangular Area of Fully-mechanized Working Face

综采面回采过程中两顺槽三角区容易产生大面积悬顶,难以垮落、存在重大隐患。神东矿区目前采取垛沙袋墙、退锚等措施处理悬顶,效果不明显。通过对综采工作面三角区悬顶打孔注入高压水,使岩层分层压裂而致顶板垮落,取得较好成效。若用高压水致裂技术再配合退锚技术,悬顶垮落效果将会明显提高。

Large-area suspended roof occurs easily in the triangular area of fully-mechanized workingface in the caving process. Since the roof does not collapse easily, mining area, sandbag wails, anchor withdrawing, and other measures huge hidden danger exists. In Shendong are used to deal with the suspended roof, but the effects are not obvious. By injecting high-pressure water into the slotting of the suspended roof, separated layers＇ fracturing can cause roof falling, which has achieved an ideal effect. If combined with anchor withdrawing technology, the falling effect of suspended roof can be greatly improved