Title:
METHOD FOR DETERMINING FEASIBILITY OF NON-PILLAR GOB-SIDE ROOF-CAVING ROADWAY FORMATION
Document Type and Number:
WIPO Patent Application WO/2019/062283
Kind Code:
A1
Abstract:
A method for determining the feasibility of non-pillar gob-side roof-caving roadway formation, comprising: step I, determining an immediate roof thickness MZ and a burial depth W, and calculating a roadway gob-side lateral hanging roof length L; step II, calculating the height H of a wall body formed by means of accumulation after immediate roof caving, and calculating a minimum permissible wall body height Hmin (Hmin1 and Hmin2) of roof-caving roadway formation; and step III, comparing the roadway gob-side lateral hanging roof length L with a given maximum permissible hanging roof length Lmax of roof-caving roadway formation, enabling L to be less than Lmax, comparing the height H of the wall body with the minimum permissible wall body heights Hmin1 and Hmin2 of roof-caving roadway formation on the basis that L is less than Lmax, and if H is greater than max{Hmin1, Hmin2}, determining that a working face can be constructed by means of non-pillar gob-side roof-caving roadway formation. The method is simple and easy, facilitates determining of engineering personnel before construction, and can be used for accurately determining whether non-pillar gob-side roof-caving roadway formation construction meets construction conditions. If the construction conditions are met, a roadway formed may have a relatively good effect and meets stoping requirements of the next working face.
Inventors:
SHI YONGKUI (CN)
XU MINGWEI (CN)
HAO JIAN (CN)
ZHU HUAIZHI (CN)
ZHANG LIANGLIANG (CN)
XU MINGWEI (CN)
HAO JIAN (CN)
ZHU HUAIZHI (CN)
ZHANG LIANGLIANG (CN)
Application Number:
PCT/CN2018/095608
Publication Date:
April 04, 2019
Filing Date:
July 13, 2018
Export Citation:
Assignee:
UNIV SHANDONG SCIENCE & TECH (CN)
International Classes:
E21C41/16; E21D9/04; G06F17/50
Foreign References:
| CN107862106A | 2018-03-30 | |||
| CN104141506A | 2014-11-12 | |||
| CN106988744A | 2017-07-28 | |||
| CN103573287A | 2014-02-12 | |||
| US7934766B2 | 2011-05-03 |
Attorney, Agent or Firm:
QINGDAO ZHIDILINGCHUANG PATENT AGENCY CO., LTD (CN)
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