Title:
DRILLING AND GROUTING DETECTION METHOD FOR DISTRIBUTION CHARACTERISTICS OF MINING-INDUCED BED SEPARATION IN OVERLYING STRATA
Document Type and Number:
WIPO Patent Application WO/2018/233329
Kind Code:
A1
Abstract:
Disclosed is a drilling and grouting detection method for distribution characteristics of mining-induced bed separation in the overlying strata. Along a mining area, with a tendency to be near two sides of a mining boundary and with a tendency towards a middle portion, constructing a small-diameter grouting borehole (1); injecting a cement slurry into the small-diameter grouting borehole (1), then sealing the entire borehole such that an overlying strata bed-separation zone (3) near the borehole is filled with the cement slurry; after the cement slurry in the hole to be sealed is completely solidified, using the center of the small-diameter grouting borehole (1) as a center and switching to use a large-diameter drill bit to construct a large-diameter core-drilling borehole (2); performing columnar weaving on a rock core (5) that is drilled by the large-diameter core-drilling borehole (2); and according to the distribution position of the solidified cement that is displayed on the column, visually determining the position of the overlying strata separation-layer zone (3) and the amount of bed separation therein. The method utilizes a small-diameter borehole to inject a cement slurry into an overlying strata bed-separation zone, and combines the construction of a core-drilling borehole with columnar weaving, thus distribution characteristics of mining-induced bed separation in the overlying strata may be directly distinguished according to the solidified position and size of the cement slurry in the stratum; the method is simple to construct, while the method for identification is scientific and accurate, and has strong practicability.
More Like This:
Inventors:
JU JINFENG (CN)
WANG XIAOZHEN (CN)
XU JIALIN (CN)
WANG XIAOZHEN (CN)
XU JIALIN (CN)
Application Number:
PCT/CN2018/079577
Publication Date:
December 27, 2018
Filing Date:
March 20, 2018
Export Citation:
Assignee:
UNIV CHINA MINING (CN)
International Classes:
E21B49/00; E21B33/138
Foreign References:
| CN104747231A | 2015-07-01 | |||
| CN106555607A | 2017-04-05 | |||
| CN107044280A | 2017-08-15 | |||
| CN104236439A | 2014-12-24 | |||
| CN205403743U | 2016-07-27 | |||
| CN103742127A | 2014-04-23 | |||
| US4338565A | 1982-07-06 |
Attorney, Agent or Firm:
NANJING SUGAO PATENT AND TRADEMARK FIRM (ORDINARY PARTNERSHIP) (CN)
Download PDF:
Previous Patent: PROTEIN LOADING BUFFER AND USE THEREOF IN PREPARATION OF PROTEIN CHIP
Next Patent: PAN-TILT AND CAMERA ASSEMBLY HAVING SAME
Next Patent: PAN-TILT AND CAMERA ASSEMBLY HAVING SAME