摘要
以皖北矿区厚含水松散层下超薄基岩开采工作面实测矿压资料与实验数据为依据,论述了超薄基岩工作面顶板的风化变异特征。首次提出了厚含水松散层下超薄基岩开采工作面无老顶控制关键层、无自承能力,有效导水裂隙带与冒落带基本一致以及静压大、动压小,移动快、变形大、下沉大、回缩压密快和破坏影响范围小等一系列变形移动破坏新特征。分析了矿压显现与覆岩破坏移动演化特征产生的机理,着重阐述了为确保在超薄基岩内安全开采,应加大开采高度。采用“护—让结合”以及实行“采空区滞后控水、煤水分流、物探预测、地质弱面预先加固”等控制顶板与防止水患的调控技术保障措施。突破了水体下开采“降低并控制采高”的开采原则;取得了安全、高效的开采效果。
Based on measured rock pressure and experimental data under thick watered loose bed of Wanbei mining area, dimorphism and mutation characteristics of ultrathin bedrock working face roof are discussed. New deformation and movement characteristics of roof are put forward under thick watered loose bed. Mechanism of strata behaviors and overburden destroy evolvement characteristics are analyzed. The adjusting and controlling technology and measures to control roof and prevent water disaster are put forward. Mining principles under water of decreasing and controlling mining height are broken through and safe and high mining effects are obtained.
出处
《安徽理工大学学报（自然科学版）》
CAS
2006年第2期12-16,共5页
Journal of Anhui University of Science and Technology:Natural Science
基金
安徽省教育厅自然科学基金资助项目(2006kj001B)
安徽省国土资源厅地质灾害治理资金资助项目(2005-1085)
关键词
超薄基岩
覆岩破坏演化特征
调控技术
皖北矿区
ultrathin bedrock
overburden destroy evolvement characteristics
adjusting and controlling technology
Wanbei. mining area
