1.
Probe into Improving Recovery Ratio of Caving Coal at π Steel Beam Caving Coal Face by Deep Hole Pre-Fracture Blasting
深孔预裂爆破提高π型钢梁放顶煤回采率可行探讨
2.
Technical Issues of Mining for Coal with"π"Model Girder Roof Coal;
“π”型钢梁放顶煤开采中的若干技术问题分析
3.
Application of BDY Sliding Support in Provement of π Type Steel Caving Technology
BDY滑移支架在π型钢放顶煤工艺改革中的应用
4.
π Inflammable Thick Seam Steel Caving Face Note Fire-fighting Techniques of Nitrogen
易自燃厚煤层π型钢放顶煤工作面注氮防灭火技术初探
5.
Application of π type steel girder in broken easy caving roof
π型钢梁在破碎易冒落顶板中的应用
6.
Application of π-shaped steel beam of longwall mining technology with big dip
大倾角π型钢梁长壁采煤工艺的应用
7.
π Steel Beam to replace Movable Support in the Non-stop Production
π型钢梁替换悬移支架在非停产中的应用
8.
Coal-Rock Compound Mechanical Models and its Control in the Top-Coal Caving Faces;
放顶煤工作面煤岩组合力学模型及其控制
9.
Selection of Hydraulic Powered Top Coal Caving Support and Three Equipment Matching Applied to Deep Inclined Seam with Soft Roof,Soft Coal and Soft Floor
大倾角三软煤层放顶煤支架选型及三机配套
10.
The Performance Research on the Beam-column Connections of Cold Bending Light-gauge Steel C Section with Angle at Bottom and Top of the Web;
顶底角钢、腹板双角钢连接的冷弯薄壁C型钢梁柱节点性能研究
11.
Experiment Research on Connections of Cold-formed Thin-walled Steel Frame with Double Webs Top and Seat Steel Angle;
带双腹板、顶底角钢连接的冷弯薄壁型钢梁柱节点试验研究
12.
Top Coal Crushing Mechanism and Determination of Roof Caving Height in Roof Caving Workface
放顶煤工作面顶煤破碎机理及放煤高度的确定
13.
Application of the Light Breaking Props on the Comprehensive Mechanized Mining Faces in Malan Coalmine
轻型放顶煤支架在马兰矿综采工作面的应用
14.
The Research and Application of Top-coal 3D s Emulator Model;
综放开采顶煤三维仿真模型的研究及应用
15.
Brief Analysis of Type and Structures of Two-legged and Four-legged Top Coal Caving Hydraulic Powered Support
两柱与四柱放顶煤液压支架架型及结构浅析
16.
Feasibility study for light-supports applied in thinner thick-seam
轻型放顶煤支架在较薄厚煤层中应用可行性研究
17.
A Fisher discriminant analysis model for classifying top coal cavability of the steep seam
急倾斜煤层顶煤可放性分类预测的Fisher判别分析模型及应用
18.
Erect steel columns, beams, and joist - 3rd floor and roof
架设钢柱、梁和托梁：三层和楼顶