box timbering是什么意思

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Study of roof support and ore blasting in the stope where the breasting-shrinkage method is employed;

全面留矿法采场顶板支护和落矿爆破工艺的研究

This article introduces the concept and principle of a expert system of roof support,its process of developing,main function and its guiding meaning in coal mine production is also contained.

阐述了专家系统的概念和原理,“顶板支护专家系统”的研究开发过程、主要功能以及其在指导煤矿生产过程中的意义。

The Supporting Study of Soft-Rock Composite Roof of Stoping Tunnel in Saqu Coal Mine;

沙曲矿回采巷道软岩复合顶板支护研究

Research on fully mechanized mining face ending removing space roof supporting form

综采工作面收尾撤架空间顶板支护方式探讨

A New Technology of Roof Supporting in End-mining of Full-mechanized Mining Face

综采工作面收尾施工中顶板支护的一种新技术

Discussin on Bolt and Cable Supporting Technique of the Comples Roof

复合顶板巷道锚杆锚索支护技术探讨

Practice of the Timbering of Composite Top - Tray Drift Anchored Cable Ret Cord

复合顶板沿空巷道锚梁网索支护实践

Experience in combined supporting for use in large-span underground chamber under soft roof strata

软岩顶板下大断面硐室联合支护经验

Support Density Calculation and Roof Management in Blast Mining Face

炮采工作面支护密度计算及顶板管理

Study on cable-beam support technology of big section area roof board with weathering and flabbiness character

大断面风化顶板锚梁喷支护技术的试验研究

Study on the affection of roof crevice water to the stability of mining roadways supported by cable bolts

顶板裂隙水对锚索支护巷道稳定性的影响研究

Application of supporting technology combination of anchor cable and bolt in friable roof support

锚索锚杆联合支护在破碎顶板中的应用

Study on the Stability Classification of Entry Roof and the Support Principle of the Bolting Structure;

巷道顶板稳定性分类及锚固支护机理研究

Study on Failure Law and Support Technique of Stratified and Weak Rock Roof of Roadway;

煤巷层状软岩顶板破坏规律及支护研究

Study on Roof Separation and Support Technology of Mining Roadways in Deep Mine;

深井回采巷道顶板离层与支护技术研究

Reserving space for lane along the tunnel under the condition of soft coal bed,compound roof supports and protections;

松软煤层复合顶板联合支护 沿空留巷探讨

Application on Bolting Support in Soft Compound Roof Tunnel

锚杆支护在松软复合顶板巷道中的应用

Bolting Feasibility Analysis of compound roof entry in WuFeng coal mine

五凤煤矿复合顶板巷道锚杆支护可行性分析

Failure Mechanism and Supporting Technique in Compound Roof Entry

复合顶板巷道破坏机理及支护技术研究

Pre-stressed Bolt Anchor-truss Support Technology in Composite Roof Roadway

复合顶板巷道预应力锚杆锚索桁架支护技术