CN102418513B - Method for detecting treatment effect of road goaf - Google Patents
Method for detecting treatment effect of road goaf Download PDFInfo
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- CN102418513B CN102418513B CN 201110239405 CN201110239405A CN102418513B CN 102418513 B CN102418513 B CN 102418513B CN 201110239405 CN201110239405 CN 201110239405 CN 201110239405 A CN201110239405 A CN 201110239405A CN 102418513 B CN102418513 B CN 102418513B
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Abstract
The invention relates to a method for detecting the treatment effect of a road goaf. The method comprises the following steps: (1) after treating the goaf for six months, determining inspection holes according to 2% of injected holes; (2) carrying out drilling coring on the inspection holes and visually observing the filling effect of the goaf; (3) grouting drill holes by utilizing neat cement grout, wherein the grouting process and grouting parameters are consistent with goaf grouting treatment, the grouting stop pressure is 2-3MPa, the acceptance of grout is less than 50L/min, and the duration time is 10-15 minutes; and (4) evaluating the treatment effect of the goaf according to the quantity of injected grout. The method for detecting the treatment effect of the road goaf can be used for carrying out quantitative evaluation on the treatment effect of the goaf, is simple and is same as grouting treatment. According to the method, the engineering work load is not increased; through drilling coring, the filling effect of the goaf can be visually observed; and when the treatment effect of the goaf is evaluated to be poor, grouting can be carried out for remediation.
Description
Technical field
The invention belongs to a kind of decision method, be specifically related to a kind of method for detecting treatment effect of road goaf.
Background technology
At present, domestic and international have the monitoring of the monitoring net of layout about goaf punishment effect decision method commonly used, TV in probing, physical prospecting, excavation detection, the hole.(1) monitoring net monitoring by arranging suitable monitoring net, is monitored distortion after the punishment of goaf, but quantitative assessment goaf punishment effect.The method can be intuitively, quantitative assessment goaf stable state, for goaf prospecting and Treatment Design provide basic data; But the cycle is longer, implements difficulty, uses not general.(2) probing, the goaf punishment was selected the point of some after 6 months, and employing is drilled, is got the core observation procedure and detects slip casting effect.The method is directly to obtain the effective method of slip casting effect data, takes observation etc. by drilling process, core, directly obtains the formation data in the punishment scope after the punishment of goaf, and the punishment effect is estimated, and the method is widely used, and effect is fine.(3) physical prospecting, physical prospecting are the householder methods that the goaf is detected, and can be divided into physical prospecting in ground physical prospecting and the hole.The ground physical prospecting is that slip casting finishes the rear survey line of laying on the earth's surface, adopts transient electromagnetic method and high-density electric to carry out slip casting front and back waveform and parameter comparison, and it is tight generally to be used for the engineering time requirement, but qualitative judgement, and human factor is more; Physical prospecting is to do between velocity of wave well logging or hole CT etc. to detect in inspection eye in the hole, can record borehole circumference stratum velocity of wave index, judges goaf punishment effect according to criterion of acceptability.(4) TV detects in the hole, in inspection eye, utilizes digital shooting can directly observe the distribution situation of cavity, crack and the underground water of hole wall rock mass, observes more intuitively the integrated degree of rock mass, estimates the punishment effect in goaf.But what shooting was used in the hole is optical principle, requiring in the hole is clear water or dry hole, mostly compose in the inspection eye hole, goaf and have water, be subjected to the pore-forming Restricted requirement, in Slurry-filled Drill Hole because water turbidity, use effect not good enough (5) excavation to detect, the excavation detection method is to excavate prospect pit, test pit to punishment section bottom above empty ground punishment, observation punishment section obturation thickness and filling situation, observation has or not the cavity, and test charges intensity draws pack completeness, carry out in case of necessity field trial, determine bearing capacity.The construction of excavation detection method is simple, directly perceived, and both economical, is applicable to the check of shallow embedding cavity punishment effect.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method for detecting treatment effect of road goaf, and the method step is simple, can intuitively observe highway goaf punishment effect, the punishment effect in quantitative assessment highway goaf.
Technical scheme of the present invention: a kind of method for detecting treatment effect of road goaf, its step is as follows: (1), is pressed 2% of injected hole and is determined to detect the hole after 6 months in the goaf punishment; (2) carry out boring and coring to detecting the hole, intuitively observe the goaf filling effect; (3) adopt neat slurry that slip casting is carried out in boring, grouting process is consistent with the goaf grouting punishment with grouting parameter, and stopping annotating pressure is 2～3MPa, and the midge amount is less than 50L/min, and the duration is 10～15 minutes; (4) according to injection slurry amount what, estimate goaf punishment effect.
The present invention compared with prior art has following beneficial effect: but 1. effect is punished in the quantitative assessment goaf, and method is simple identical with Grouting, and does not increase engineering quantity; 2. in implementation process, by boring coring, can intuitively observe the goaf filling effect; 3. when estimating goaf punishment poor effect, can remedy by slip casting.
The specific embodiment
A kind of method for detecting treatment effect of road goaf after 6 months, adopts straight cement slurries to carry out multiple notes to detecting the hole in the goaf grouting punishment, estimates goaf punishment effect with multiple fluence.Its step is as follows: (1), is pressed 2% of injected hole and is determined to detect the hole, and be numbered after 6 months in the goaf punishment.It is bridge, tunnel and roadbed goaf harnessing scope that inspection eye is laid emphasis, it is less important check point that the goaf harnessing scope reaches boundary belt outward, it is excessive to take into account simultaneously in the Grouting process single hole grout consumption, or the position of the anomalies such as interruptions occurs, or there is the position of hidden danger of quality in the unstable position of the outside marginal zone in the serious position of geologic structure complexity, caving collapse and goaf and inner edge marginal zone; (2) carry out boring and coring to detecting the hole, intuitively observe the goaf filling effect, boring aperture is not less than 91mm, and every round trip core recovery is greater than 90%.By to the bury drills in the drilling process, fall the analysis contrast of the situations such as brill, drilling depth speed, circulation fluid consumption, rock mass completeness, intuitively observe the goaf filling effect; (3) adopt neat slurry that slip casting is carried out in boring, the slurries water-solid ratio is 1:1.4～1:1.6, midge amount and the pump pressure of time sight pump, the various phenomenons that occur in the record slip casting process, collect initial data, and in time adjust grouting amount and concentration of slurry according to actual conditions.During slip casting, avoid injecting at short notice a large amount of cement pastes, termination slip casting standard is: stop annotating pressure 3MPa, the midge amount is less than 50L/min, and the duration is 15 minutes; (4) according to injection slurry amount what, estimate goaf punishment effect.
Experimental study shows, if when injecting the slurry amount less than the punishment construction 5% of the average injection rate of single hole, thinks that the goaf punishment has reached designing requirement, punishes respond well.If when injecting the slurry amount greater than the punishment construction 5% of the average injection rate of single hole, think that goaf punishment effect exists to query, must ascertain the reason, adopt remedial measures.
Claims (1)
1. method for detecting treatment effect of road goaf, after goaf grouting is punished 6 months, adopt the straight cement slurries to carry out multiple notes to detecting the hole, estimate goaf punishment effect with multiple fluence, its step is as follows: (1) is after the goaf is punished 6 months, press 2% of injected hole and determine to detect the hole, and be numbered, detecting hole laying emphasis is bridge, tunnel and roadbed goaf harnessing scope, it is less important check point that the goaf harnessing scope reaches boundary belt outward, it is excessive to take into account simultaneously in the Grouting process single hole grout consumption, or the position of the anomaly of appearance interruption, or geologic structure is complicated, the position that has hidden danger of quality at the outside marginal zone in the position that caving collapse is serious and goaf and the unstable position of inner edge marginal zone; (2) carry out boring and coring to detecting the hole, observation goaf filling effect directly perceived, boring aperture is not less than 91mm, every round trip core recovery is greater than 90%, by to the bury drills in the drilling process, fall the analysis contrast of the situation of brill, drilling depth speed, circulation fluid consumption, rock mass completeness, intuitively observe the goaf filling effect; (3) adopt neat slurry that slip casting is carried out in boring, the slurries water-solid ratio is 1:1.4～1:1.6, want midge amount and the pump pressure of time sight pump, the various phenomenons that occur in the record slip casting process are collected initial data, and are in time adjusted grouting amount and concentration of slurry according to actual conditions, avoid injecting at short notice a large amount of cement pastes during slip casting, stopping the slip casting standard is: stop annotating pressure 3MPa, the midge amount is less than 50L/min, and the duration is 15 minutes; (4) according to injecting what of slurry amount, estimate goaf punishment effect, experimental study shows, if when injecting the slurry amount less than the punishment construction 5% of the average injection rate of single hole, thinks that the goaf punishment has reached designing requirement, punishes respond well; If when injecting the slurry amount greater than the punishment construction 5% of the average injection rate of single hole, think that goaf punishment effect exists to query, must ascertain the reason, adopt remedial measures.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110239405 CN102418513B (en) | 2011-08-19 | 2011-08-19 | Method for detecting treatment effect of road goaf |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110239405 CN102418513B (en) | 2011-08-19 | 2011-08-19 | Method for detecting treatment effect of road goaf |
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| CN102418513A CN102418513A (en) | 2012-04-18 |
| CN102418513B true CN102418513B (en) | 2013-03-20 |
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| CN110118852B (en) * | 2019-03-23 | 2021-07-23 | 新汶矿业集团有限责任公司孙村煤矿 | Method for evaluating grouting effect of high-polymer grouting material and grouting material |
| CN110130317A (en) * | 2019-05-07 | 2019-08-16 | 中铁十六局集团第一工程有限公司 | Goaf Treatment Methods are lied prostrate on a kind of freeway tunnel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806054A (en) * | 2010-04-02 | 2010-08-18 | 中铁二局股份有限公司 | Method for estimating stability of house pillar type goaf under highway |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806054A (en) * | 2010-04-02 | 2010-08-18 | 中铁二局股份有限公司 | Method for estimating stability of house pillar type goaf under highway |
Non-Patent Citations (9)
| Title |
|---|
| 唐津高速公路采空区地基处理检测;齐英双;《交通世界(建养.机械)》;20110430(第4期);第168-170页 * |
| 崔颖超 * |
| 张晓春.禹登高速公路下伏采空区注浆治理工程质量检测技术.《交通标准化》.2007,(第7期),y. * |
| 张瑞征.高等级公路采空区治理检测初探.《交通标准化》.2009,(第19期),y. |
| 王昌达.高速公路下伏采空区注浆质量综合检测技术.《山西建筑》.2009,(第24期),第227-228页. |
| 郭汉超 * |
| 高等级公路采空区治理检测初探;张瑞征;《交通标准化》;20091031(第19期);第1-2节 * |
| 高速公路下伏采空区注浆质量综合检测技术;王昌达;《山西建筑》;20090831(第24期);第227-228页 * |
| 齐英双.唐津高速公路采空区地基处理检测.《交通世界(建养.机械)》.2011,(第4期),第168-170页. |
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| CN102418513A (en) | 2012-04-18 |
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