rigid pushing

Numerical Simulation of hard roof processing step;

坚硬顶板处理步距的数值模拟

Numerical simulation of moving features of hard roof with three-dimensional discrete element method and nonlinear dynamic analysis;

坚硬顶板运动特征的数值模拟及非线性动力学分析

Numerical simulation study with 3DEC on impacted movement of hard roof in manless working face extraction;

无人工作面开采坚硬顶板冲击运动的3DEC数值模拟研究

To make out the distributing character of joint and crack、chang of crack and breakage developing process of top coal with advancing of workface to hard top coal of coal seam No.

为了查明保德煤矿8#煤层坚硬顶煤内节理、裂隙的分布特征,及裂隙的变化和顶煤破坏随工作面推进的发展过程,在88203工作面前方布设两个观测孔(煤孔S1和煤孔S2),采用LB钻孔数字摄像仪探测,记录节理、裂隙的发育、发展情况。

Study for macro-damage degree of weakening blast in hard top-coal;

坚硬顶煤弱化爆破的宏观损伤破坏程度研究

Distribution characteristic of breaking extending area of weakening-blast in hard top-coal;

坚硬顶煤弱化爆破的破坏区分布特征

The composition of the roof rock has a great influence on the stability of the roadway surrounding,especially for those roadway with the false-hard roof,which will be easily weathered or be weakened when encountering water.

不同顶板岩性组成对巷道围岩稳定性影响很大,特别是对遇水软化、风化程度高的伪硬顶板,必须区别对待。

Study the technique of caving hanging roof in the condition of hard roof of room-and-pillar mining.;

房柱式开采坚硬顶板条件下悬顶放顶技术研究

STUDY OF CONTROL CAVING METHODS AND REASONABLE HANGING ROOF LENGTH ON HARD ROOF

坚硬顶板控制放顶方式及合理悬顶长度的研究

Technology and Control of First Roof Caving at Fully Mechanized Coal Face with Hard and Massive Overlying Strata

厚层坚硬顶板综采工作面初次放顶技术管理

Research on Reasonable Hanging Arch Length of Hard Roof in Fully Mechanized Coal Mining Face

综采工作面坚硬顶板合理悬顶长度研究

Roof Control Design and Practice of Very Hard Roof in Coalface Instead of Knife and Pillar Mining Method in Mentougou Mine-

门头沟矿坚硬顶板取消刀柱顶板控制设计及实践

Study and Application on Stability of Hard and Massive Overlying Strata in Fully Mechanized Sublevel Caving Face;

综采放顶煤采场厚层坚硬顶板稳定性分析及应用

They prefer to brazen it out rather than admit defeat.

他们宁愿厚颜无耻地硬顶而不愿承认失败。

a drilling bit with cutting edges usually hard-tipped against wear.

有靠着钻身的硬顶和切边的一种钻井钻头。

I'm like to have a bowler hat.

我想买一顶圆顶硬礼帽。

Don't be afraid of the violent storm, toughen yourselves and bear it.

不要怕惊涛骇浪，硬着头皮顶

He wears a bowler to go to his office.

他上班总是戴着一顶黑色硬礼帽。

a very hard small point made from a diamond.

用钻石做的非常坚硬的小尖顶。

I felt something hard pressing against my side.

我觉得有什么硬东西顶着我的腰。

She wore a sailor hat of black straw.

她戴着一顶扁平的硬边黑草帽。

A stiff felt hat with a round crown and a narrow, curved brim.

常礼帽圆顶,窄的弯曲帽檐的硬毡帽

She had to steel her heart against pity.

她须硬起心肠以顶住怜悯之情.

He tried to brave it out when the police questioned him.

警察盘问他时, 他想硬着头皮顶过去.

The Research and Development on Broadcom HDTV Set-Top Box System;

Broadcom高清机顶盒方案的软硬件研究