Brief analysis on the destabilization of the roof bolting by means of catastrophe theory

Weathering Weak Entry of Composite Roof Bolting Technology Research

软弱风化复合顶板巷道锚杆支护技术研究

Several cases of roof bolting application in various mining and geological conditions were described.

在不同的采矿地质条件下，进行了多种顶板锚固应用研究。

Main research results as: 1. Premature bolting of Angelica sinensis could not be only obviously decreased, but also possibly be avoid by medium seedling raising in greenhouse in winter.

得出如下主要结论：1、冬季基质育苗不仅可大幅度降低当归早期抽薹率，而且有可能完全规避抽薹。

Seedling growth, plant growth, premature bolting, yield and quality of Angelica sinensis were obviously influenced by sowing date in seedling bed raising in greenhouse in winter.

冬季床播育苗的播种期对当归苗的生长及定植后的生长发育、早抽薹、产量及品质都有较大影响。

Seed vitality was also influenced by mother plant and branch position in some way. Seeds came from premature bolting plants had higher vitality than that from normal lateral branches.

采种母株和采种部位对当归种子活力也有影响，当年产早薹籽活力高于正常采收的侧穗籽。

In order to solve the problem of premature bolting that exists in spring Chinese cabbage production. The certified method of bolting tolerance in Chinese cabbage was studied.

为了解决春大白菜生产中存在的未熟抽薹问题，开展了大白菜耐抽薹性及其鉴定方法的研究。

In cabbage production, premature bolting occurred from time to time is the important issues that need to be addressed in the spring vegetable production.

在甘蓝生产中，未熟抽薹现象时有发生，是春季甘蓝生产中需要解决的重要问题。

Inhibition of matrix seedling raising in winter on premature bolting of Angelica sinensis

冬季基质育苗抑制当归早期抽薹的效应研究

Premature bolting has been a chief obstructive factor in Angelica sinensis production for many years.

多年来，早期抽薹是制约当归生产的首要问题。

The compound support consisting of side and bottom bolting and bottom-hole destress blasting in the rise side floor of roadway can efficiently control the floor heaves of roadway so as to stabilize its surrounding rock.

采用帮底锚杆并在巷道上帮底角孔底爆破卸压的复合支护，可以有效地控制巷道的底鼓，达到巷道围岩的稳定。

How to Elect Handling Capacity of Bolting Mill Reasonably

如何合理选择筛分机械的处理量

Woven silk fabric, containing 85% or more by weight of silk or of silk waste ( excl. noil silk, bolting cloth and pile and chenille fabrics)

机织丝织物，含蚕丝或废丝重量达85%或85%以上（不包括紬丝、筛绢、绒头织物和绳织物）

Woven fabric of noil silk ( excl. bolting cloth and pile and chenille fabrics)

机织紬丝织物（不包括筛绢、绒头织物和绳绒织物）色彩变幻的丝织物。

Bolting cloth [ whether in the piece or cut to shape]

筛布[不论成幅还是剪裁成一定形状]

Bolting ( screwing) machine ( excl. hand tools)

杆柱（螺杆）安装机（手持工具除外）

The preliminary knowledge of the equipment configuration and adaptability of the header with bolting machine is obtained by means of the underground industrial experiment of excavation and bolting integration.

通过掘支锚一体化井下工业性试验，对掘锚机的设备配套及适应性有了初步的认识；

Hydraulic Drilling, Loading and Bolting Machine Simulative testing bench of chain tension for mooring anchor winch

全液压钻装锚机组系泊锚机缆绳张力仿真试验台

Discussion on Some Issues in Research and Development of Roof Bolting Machine

对锚杆钻机研制中几个问题的探讨&岩石钻孔参数的弹性配合

Experiment Study of the Bolting Net Steel Support

锚网钢支架复合型支护的试验研究

Experimental Study on Bolting Steel Band Reinforce the Wide-Flat Concrete Structural Elements

螺栓固定钢板带加固混凝土宽扁构件受弯试验研究