CN102492405B - Grouting material for reinforcing fragmentized coal body - Google Patents
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Abstract
一种用于破碎煤体加固的注浆材料,由A、B两种溶液组成,A:聚硅溶液,由摩尔比小于1.5、游离甲醛含量≤3mg/100g的E0级环保脲醛树脂与质量浓度为30~40%硅溶胶,硅溶胶PH值8~9,平均粒径7~24nm,比表面积140~400m2/g,粘度17~20cp;按质量比2:1在20~30摄氏度温度条件下混合生成的质量浓度为30~45%的乳白色聚硅溶液,再加入聚硅溶液特制增韧剂4%;B液:质量浓度为4%~10%的GaCL2水溶液和质量浓度为5%~12%的氧化淀粉的水溶液按1:1常温混合,作为固化剂;A、B液在质量比4:1~5:1范围混合后能在几分钟~2小时内迅速固化并形成强度;该注浆材料,不带电,不燃烧,粘度低,耐高温,保质期长,在固化剂和增韧剂作用下能迅速固化成型,固化后具有很高强度,不燃烧,安全可靠。A grouting material for the reinforcement of broken coal bodies, consisting of two solutions A and B, A: polysilicon solution, made of E 0 grade environmentally friendly urea-formaldehyde resin with a molar ratio of less than 1.5 and a free formaldehyde content of ≤3mg/100g and quality The concentration is 30-40% silica sol, the pH value of silica sol is 8-9, the average particle size is 7-24nm, the specific surface area is 140-400m 2 /g, the viscosity is 17-20cp; the temperature is 20-30 degrees Celsius according to the mass ratio of 2:1 Milky white polysilicon solution with a mass concentration of 30-45% is mixed under the conditions, and then 4% of a special toughening agent is added to the polysilicon solution; B solution: GaCl 2 aqueous solution with a mass concentration of 4%-10% and a mass concentration of 5% %~12% aqueous solution of oxidized starch is mixed at 1:1 at room temperature as a curing agent; A and B liquids can be quickly solidified and form strength within a few minutes to 2 hours after mixing in a mass ratio of 4:1 to 5:1 ; The grouting material is not charged, does not burn, has low viscosity, high temperature resistance, long shelf life, and can be quickly solidified and formed under the action of curing agent and toughening agent. After curing, it has high strength, does not burn, and is safe and reliable.
Description
技术领域 technical field
本发明涉及一种对强度比较低的破碎煤岩体的注浆加固材料,特别是一种用于破碎煤体加固的注浆材料。 The invention relates to a grouting reinforcement material for broken coal and rock bodies with relatively low strength, in particular to a grouting material for reinforcement of broken coal bodies.
背景技术 Background technique
破碎煤岩是工作面开采和巷道掘进中经常遇到的工程难题。我国破碎顶板煤层所占比例重大,根据对38个主要矿务局的调查,属于破碎顶板(相当于顶板分类中的1类顶板)的煤层储量占这些局的54.5%。因此,在回采工作面极易产生冒顶事故。煤岩体巷道在开采和掘进过程中,一般存在以下安全问题:①在煤岩体严重破碎地段,巷道顶煤和部分直接顶在全巷道宽度上冒落,片帮深度大,施工难度大,安全状况差,易造成事故;②巷道顶部冒落后形成空洞,积存大量瓦斯,给通风和瓦斯管理带来很多困难,存在事故隐患;③在冒落空洞内施工木垛勾顶作业极其危险,局部施工的木垛接顶效果差或不接顶,支架因顶梁空支处于失稳状态,在迎头冒顶时,易造成支架砸坏或推垮。 Fractured coal and rock is an engineering problem often encountered in face mining and roadway excavation. Broken roof coal seams account for a large proportion in my country. According to the survey of 38 major mining bureaus, coal seam reserves belonging to broken roof (equivalent to Type 1 roof in the roof classification) account for 54.5% of these bureaus. Therefore, roof fall accidents are very likely to occur in the mining face. During the mining and excavation of coal-rock roadways, there are generally the following safety problems: ① In the section where the coal-rock mass is severely broken, the top coal and part of the roadway directly fall on the entire width of the roadway, the depth of the side is large, and the construction is difficult. Poor safety conditions can easily cause accidents; ②The top of the roadway collapses and forms a cavity, accumulating a large amount of gas, which brings many difficulties to ventilation and gas management, and there are hidden dangers of accidents; The wooden cribs under construction are poorly connected to the top or not connected to the top, and the bracket is in an unstable state due to the empty support of the top beam. When the roof falls head-on, it is easy to cause the bracket to be smashed or collapsed.
对破碎煤岩进行有效处理,通常的处理方法一种是增加支护材料,另一种就是注水泥浆。增加支护材料对采煤支架的移动带来很大的影响,又不能从根本上解决冒顶问题;水泥浆又因其可注性差等工程性质影响,而达不到注浆加固效果。所以,寻找新注浆达到加固煤岩具有重要的研究意义。 To effectively deal with broken coal and rock, one of the usual treatment methods is to increase support materials, and the other is to inject grout. Adding supporting materials has a great impact on the movement of the coal mining support, but it cannot fundamentally solve the roof fall problem; the cement slurry cannot achieve the effect of grouting reinforcement due to its poor injectability and other engineering properties. Therefore, finding new grouting to strengthen coal rock has important research significance.
目前,用于破碎煤体加固的化学注浆材料(如双组分的聚亚胶脂注浆材料),其在使用过程中存在以下3个方面的问题: At present, chemical grouting materials (such as two-component polyurethane resin grouting materials) used for the reinforcement of broken coal bodies have the following three problems during use:
1)粘度高,流动性差,只适合于破碎煤体工作面迎头局部短距离(<5m)的注射注浆,不适合在回风巷和进风巷的长钻孔注浆。针对大工作面的整体注浆,其加固效果大大受到限制; 1) With high viscosity and poor fluidity, it is only suitable for local short-distance (<5m) injection grouting on the broken coal working face, and is not suitable for long borehole grouting in the air return lane and the air inlet lane. For the overall grouting of large working faces, the reinforcement effect is greatly limited;
2)价格昂贵,目前市场价格在3万—4万/吨之间,不适合工作面的注浆量较大的破碎煤体加固工程应用。 2) The price is expensive. The current market price is between 30,000 and 40,000 per ton. It is not suitable for the application of broken coal reinforcement projects with a large amount of grouting on the working face.
3)需要专门的进口注浆机具。 3) Special imported grouting equipment is required.
4)其他类别注浆材料存在易燃、易爆的潜在危险。 4) Other types of grouting materials are potentially flammable and explosive.
发明内容 Contents of the invention
本发明的目的是要提供一种:加固煤矿破碎煤体时价格低廉、环保、高强、安全的用于破碎煤体加固的注浆材料。 The object of the present invention is to provide a low-cost, environmentally friendly, high-strength and safe grouting material for strengthening broken coal bodies in coal mines.
本发明的目的是这样实现的:该注浆材料,由A溶液和B溶液两种溶液组成;其中A溶液为聚硅溶液,包括:脲醛树脂和硅溶胶,按质量比2:1配合,在20~30摄氏度温度条件下混合生成质量浓度为30~45%的乳白色聚硅溶液,再加入聚硅溶液特制增韧剂4%,作为注浆材料的主液;所述的脲醛树脂的固含量为35~40%,摩尔比小于1.5,游离甲醛含量≤3mg/100g的E0级环保脲醛树脂;所述的硅溶胶的质量浓度为30~40%,硅溶胶PH值8~9,平均粒径7~24nm,比表面积140~400m2/g,粘度17~20cp; The purpose of the present invention is achieved in this way: the grouting material is composed of two solutions, A solution and B solution; wherein A solution is a polysilicon solution, including: urea-formaldehyde resin and silica sol, which are mixed in a mass ratio of 2:1. Mix at 20-30 degrees Celsius to form a milky white polysilicon solution with a mass concentration of 30-45%, and then add 4% of a special toughening agent to the polysilicon solution as the main liquid of the grouting material; the solid content of the urea-formaldehyde resin 35-40%, molar ratio less than 1.5, free formaldehyde content ≤ 3mg/100g E grade 0 environment-friendly urea-formaldehyde resin; the mass concentration of the silica sol is 30-40%, the pH value of the silica sol is 8-9, and the average particle size Diameter 7~24nm, specific surface area 140~400m 2 /g, viscosity 17~20cp;
B溶液为固化剂,包括氯化钙和氧化淀粉,其中氯化钙的纯度为90%,分别向氯化钙和氧化淀粉中加入纯净水拌制成水溶液,氯化钙水溶液的质量浓度为4%~10%;氧化淀粉的水溶液的质量浓度为5%~12%,按1:1质量配比,在常温下混合; B solution is solidifying agent, comprises calcium chloride and oxidized starch, and wherein the purity of calcium chloride is 90%, adds pure water in calcium chloride and oxidized starch respectively and mixes to make aqueous solution, and the mass concentration of calcium chloride aqueous solution is 4 %~10%; the mass concentration of the aqueous solution of oxidized starch is 5%~12%, according to the mass ratio of 1:1, mixed at room temperature;
A溶液和B溶液的质量比为4:1~5:1。 The mass ratio of A solution and B solution is 4:1-5:1.
有益效果,由于采用了上述方案,脲醛树脂胶体是高度分散的分散体系,其分散粒子尺寸在0.1 ~10 之间。由于胶体的粒子有很大的比表面, 体系的自由能也很高, 所以, 粒子有自动聚集以降低体系表面能的趋势, 属热力学不稳定体系, 而其稳定性取决于粒子之间的吸引力和排斥力。粒子碰撞有两种结果, 一种是斥力大于引力, 溶胶仍保持原状, 另一种是引力大于斥力, 引起聚结, 所以在粒子浓度很低, 达不到一定的表面积和表面能时, 不会自动发生聚结, 在不含电解质或电解质浓度很低的溶胶内, 溶胶粒子间的排斥力足以阻止粒子间自动聚集, 从而保持原状。相反, 若以上两种浓度达到某种匹配, 就会出现聚结仍致凝固。 Beneficial effects, due to the adoption of the above scheme, the urea-formaldehyde resin colloid is a highly dispersed dispersion system, and its dispersed particle size is 0.1 ~10 between. Since the particles of the colloid have a large specific surface area and the free energy of the system is also high, the particles tend to automatically aggregate to reduce the surface energy of the system, which is a thermodynamically unstable system, and its stability depends on the attraction between the particles. force and repulsion. Particle collision has two results, one is that the repulsive force is greater than the attractive force, and the sol remains in its original state, and the other is that the attractive force is greater than the repulsive force, causing coalescence, so when the particle concentration is very low and cannot reach a certain surface area and surface energy, no Coalescence will occur automatically. In a sol containing no electrolyte or a very low electrolyte concentration, the repulsive force between the sol particles is sufficient to prevent the automatic aggregation between the particles, thereby maintaining the original state. On the contrary, if the above two concentrations reach a certain match, agglomeration or coagulation will occur.
脲醛树脂中, 存在有质子化甲醛双吸附层, 在树脂贮存期起着稳定剂的作用。由于此质子化甲醛双吸附层的保护膜作用, 使胶体粒子发生聚集的有效碰撞机会大大下降了, 故而有较长的贮存期。然而, 一旦有电解质的介入, 固化过程就会加快。以强酸弱碱盐为例, 电解质溶解, 以正负离子进入胶液, 使胶液P H出现先下降又回升再下降的变化。原因是强酸根离子的作用, 使pH 下降, 但酸根立即与双吸附层的外层作用, 作用结果使pH 值回升, 同时被暴露的内质子层与胶液中的OH- 作用, 致使整个双吸附层破坏, 胶料之间有效碰撞大幅度提高, 发生聚结, 甲醛释放, H+ 留在胶液中, pH 再次下降。从贮存的角度考虑, 脲醛树脂胶都是在弱碱性的条件下放置, 这样可以保护此双吸附层的稳定, 从而有一定的贮存期。 In urea-formaldehyde resin, there is a double adsorption layer of protonated formaldehyde, which acts as a stabilizer during the storage period of the resin. Due to the protective film effect of the double adsorption layer of protonated formaldehyde, the effective collision chance of colloidal particle aggregation is greatly reduced, so it has a longer storage period. However, once the electrolyte is involved, the curing process will be accelerated. Taking the salt of strong acid and weak base as an example, the electrolyte dissolves, and positive and negative ions enter the glue solution, so that the pH of the glue solution first drops, then rises, and then drops again. The reason is that the action of strong acid radical ions makes the pH drop, but the acid radical immediately reacts with the outer layer of the double adsorption layer, and the result of the action makes the pH value rise, and at the same time, the exposed inner proton layer interacts with the OH- in the glue, causing the entire double adsorption layer to The adsorption layer is destroyed, the effective collision between the rubber materials is greatly improved, coalescence occurs, formaldehyde is released, H+ remains in the glue solution, and the pH drops again. From the perspective of storage, urea-formaldehyde resin glue is placed under weakly alkaline conditions, which can protect the stability of the double adsorption layer and thus have a certain storage period.
硅溶胶ph值在8~12之间,比表面积为50~400m2/g,粒径范围在1-100nm之间,与一般粒径0.1~10的乳液相比粒径小的多,因此,硅溶胶的加入对脲醛醛树脂有3个方面的作用①能够脲醛树脂溶液保持较好的弱碱环境,增加其保质期。②硅溶胶颗粒更容易分散到树脂中,进一步提高混合溶液固结后的力学性质。③硅溶胶和脲醛树脂固化都属于微观粒子的聚结和沉降过程,因此在固化剂氯化钙等溶液作用下,改变了脲醛树脂和硅溶胶稳定共存的弱碱环境,分别使得脲醛树脂和硅溶胶聚结沉降并形成各自三维网状结构,这种三维网状结构相互交错,最终凝胶和固化。 The ph value of silica sol is between 8~12, the specific surface area is 50~400m 2 /g, and the particle size range is between 1-100nm, which is different from the general particle size of 0.1~10nm. The particle size of the emulsion is much smaller than that of the urea-formaldehyde resin. Therefore, the addition of silica sol has three effects on the urea-formaldehyde resin. ① It can maintain a better weak alkaline environment for the urea-formaldehyde resin solution and increase its shelf life. ② Silica sol particles are easier to disperse into the resin, further improving the mechanical properties of the mixed solution after consolidation. ③The curing of silica sol and urea-formaldehyde resin belongs to the coalescence and sedimentation process of microscopic particles. Therefore, under the action of curing agent calcium chloride and other solutions, the weak alkali environment in which urea-formaldehyde resin and silica sol coexist stably is changed, respectively, making urea-formaldehyde resin and silicon The sols coalesce and settle to form their respective three-dimensional network structures, which are interlaced with each other, and finally gel and solidify.
加固煤矿破碎煤体时价格低廉、环保、高强、安全,达到了本发明的目的。 When strengthening the broken coal body of coal mine, the price is low, environmental protection, high strength and safety, and the purpose of the present invention has been achieved.
优点:本发明的固煤注浆新材料,其价格在0.6万~0.9万/吨,其初始粘度小在20cp左右,具有良好的渗透性和较高固结强度,不带电,不燃烧,粘度低,耐高温,保质期长,不燃烧,不污染环境,安全可靠,在固化剂和增韧剂作用下能迅速固化成型,凝胶时间根据现场施工情况随时可调,调节范围广,可用国产普通注浆泵注浆,使用简洁方便。可应用于煤矿井下采煤领域遇到的孤岛工作面破碎煤体、断层带破碎煤体等破碎煤岩体的注浆加固。 Advantages: The price of the new coal-fixing grouting material of the present invention is 6,000 to 9,000/ton, and its initial viscosity is as small as 20cp, with good permeability and high consolidation strength, no charge, no combustion, and high viscosity Low temperature, high temperature resistance, long shelf life, no burning, no pollution to the environment, safe and reliable, can be rapidly solidified and formed under the action of curing agent and toughening agent, the gel time can be adjusted at any time according to the construction situation on site, the adjustment range is wide, and domestic common The grouting pump is used for grouting, which is simple and convenient to use. It can be applied to the grouting reinforcement of broken coal bodies in isolated island working faces, broken coal bodies in fault zones and other broken coal bodies encountered in the underground coal mining field of coal mines.
具体实施方式 Detailed ways
实施例1:该注浆材料,由A溶液和B溶液两种溶液组成;其中A溶液为聚硅溶液,包括:脲醛树脂和硅溶胶,按质量比2:1配合,在20~30摄氏度温度条件下混合生成质量浓度为30~45%的乳白色聚硅溶液,作为注浆材料的主液;所述的脲醛树脂的固含量为35~40%,摩尔比小于1.5,游离甲醛含量≤3mg/100g的E0级环保脲醛树脂;所述的硅溶胶的质量浓度为30~40%,硅溶胶PH值8~9,平均粒径7~24nm,比表面积140~400m2/g,粘度17~20cp; Example 1: The grouting material is composed of two solutions, A solution and B solution; wherein A solution is a polysilicon solution, including: urea-formaldehyde resin and silica sol, mixed in a mass ratio of 2:1, at a temperature of 20 to 30 degrees Celsius Mixed under conditions to generate a milky white polysilicon solution with a mass concentration of 30-45%, as the main liquid of the grouting material; the solid content of the urea-formaldehyde resin is 35-40%, the molar ratio is less than 1.5, and the free formaldehyde content is ≤3mg/ 100g of E 0 grade environmental protection urea-formaldehyde resin; the mass concentration of the silica sol is 30-40%, the pH value of the silica sol is 8-9, the average particle size is 7-24nm, the specific surface area is 140-400m 2 /g, and the viscosity is 17- 20cp;
B溶液为固化剂,包括氯化钙和氧化淀粉,其中氯化钙的纯度为90%,分别向氯化钙和氧化淀粉中加入纯净水拌制成水溶液,氯化钙水溶液的质量浓度为4%~10%;氧化淀粉的水溶液的质量浓度为5%~12%,按1:1质量配比,在常温下混合; B solution is solidifying agent, comprises calcium chloride and oxidized starch, and wherein the purity of calcium chloride is 90%, adds pure water in calcium chloride and oxidized starch respectively and mixes to make aqueous solution, and the mass concentration of calcium chloride aqueous solution is 4 %~10%; the mass concentration of the aqueous solution of oxidized starch is 5%~12%, according to the mass ratio of 1:1, mixed at room temperature;
A溶液和B溶液的质量比为4:1~5:1;混合后能在几分钟~2小时内迅速固化并形成强度。 The mass ratio of solution A to solution B is 4:1~5:1; after mixing, it can solidify rapidly and form strength within a few minutes to 2 hours.
取固含量35%、E0级的脲醛树脂4000Kg,质量浓度为35%硅溶胶4000 Kg,置于反应釜中,加温至30度,反应10分钟,即生成聚硅溶液。作为A液; Take 4000Kg of urea-formaldehyde resin with a solid content of 35%, E0 grade, and 4000 Kg of silica sol with a mass concentration of 35%, put it in a reaction kettle, heat it to 30 degrees, and react for 10 minutes to form a polysilicon solution. as liquid A;
取质量比为:5:10:85,由纯度高于90%GaCL2、氧化淀粉、纯净水拌制而成的水溶液100 Kg作为B液;。 The mass ratio is: 5:10:85, and 100 Kg of an aqueous solution prepared by mixing GaCl 2 with a purity higher than 90%, oxidized starch, and purified water is used as liquid B;
利用国产普通化学注浆泵,A/B溶液按体积比A:B=4:1,在压力条件下,灌注入煤、岩体中,等其固化即可。 Using domestic ordinary chemical grouting pumps, the A/B solution is poured into coal and rock mass under pressure conditions according to the volume ratio A:B=4:1, and wait for it to solidify.
1)脲醛树脂作为注浆材料,实践证明脲醛树脂摩尔比小于1.5时浆液很难固化凝胶。本发明聚硅溶液由摩尔比小于1.5的甲醛含量≤3mg/100g的E0级环保脲醛树脂,脲醛树脂固含量35~40%,与质量浓度为30~40%硅溶胶,硅溶胶PH值8~12,平均粒径7~20nm,比表面积140~400m2/g,粘度17~20cp,按质量比5:1在30~40摄氏度温度条件下混合反应生成的质量浓度为30~45%的乳白色聚硅溶液,硅溶胶细微的颗粒,能有效的渗透到脲醛树脂的活性基团(-CH2OH、-NH-、-CH2-O-CH2-)中,在其凝胶交联形成稳定的三维网状结构与硅溶胶凝胶形成网状结构相互交错。可以作为破碎煤体加固的主要材料。 1) Urea-formaldehyde resin is used as the grouting material. Practice has proved that when the molar ratio of urea-formaldehyde resin is less than 1.5, the slurry is difficult to solidify and gel. The polysilicon solution of the present invention is composed of E grade 0 environment-friendly urea-formaldehyde resin with a molar ratio of less than 1.5 and a formaldehyde content of ≤3mg/100g. The solid content of the urea-formaldehyde resin is 35-40%, and the mass concentration is 30-40% silica sol, and the pH value of the silica sol is 8. ~12, average particle size 7~20nm, specific surface area 140~400m 2 /g, viscosity 17~20cp, mass concentration of 30~45% by mass ratio 5:1 at 30~40℃ temperature condition Milky white polysilicon solution, fine particles of silica sol, can effectively penetrate into the active groups (-CH2OH, -NH-, -CH2-O-CH2-) of urea-formaldehyde resin, and form stable three-dimensional The network structure and the silica sol gel form a network structure interlaced with each other. It can be used as the main material for the reinforcement of broken coal bodies.
2)实践证明摩尔比小于1.5的脲醛树脂由于其不易凝胶固化,不宜作为注浆材料,但摩尔比小于1.5的脲醛树脂多为环保型树脂,因此本注浆材料加入硅溶胶和氯化钙固化剂后,使得环保型脲醛树脂得以应用。 2) Practice has proved that urea-formaldehyde resins with a molar ratio of less than 1.5 are not suitable for grouting materials because they are not easy to gel and solidify, but urea-formaldehyde resins with a molar ratio of less than 1.5 are mostly environmentally friendly resins, so this grouting material is added with silica sol and calcium chloride After curing agent, the environment-friendly urea-formaldehyde resin can be applied.
2)固化剂:由纯度高于90%氯化钙、氧化淀粉、纯净水拌制而成的水溶液。其质量比为:(4~10):(5~12):(91~78)。 2) Curing agent: an aqueous solution made by mixing calcium chloride with a purity higher than 90%, oxidized starch, and purified water. Its mass ratio is: (4~10): (5~12): (91~78).
3)该注浆材料在固结后其最大抗压强度可达14MPa以上,干粘结强度达3MPa以上。 3) The maximum compressive strength of the grouting material after consolidation can reach more than 14MPa, and the dry bonding strength can reach more than 3MPa.
4)该浆液在使用时固化后具有较高强度,不燃烧,不带电,不污染环境安全可靠,可应用于煤矿井下采煤领域遇到的孤岛工作面破碎煤体、断层带破碎煤体、强度比较低的破碎煤体的注浆加固。 4) The slurry has high strength after solidification during use, does not burn, is not charged, does not pollute the environment, is safe and reliable, and can be applied to the broken coal body of the isolated island working face, the broken coal body of the fault zone, Grouting reinforcement of broken coal bodies with relatively low strength.
实施例2:取固含量39%、E0级的脲醛树脂4000Kg,质量浓度为40%硅溶胶1000 Kg,置于反应釜中,加温至25度,反应10分钟,即生成聚硅溶液。作为A液; Example 2: Take 4000 Kg of urea-formaldehyde resin with a solid content of 39%, E0 grade, and a mass concentration of 40% silica sol 1000 Kg, place it in a reaction kettle, heat it to 25 degrees, and react for 10 minutes to generate a polysilicon solution. as liquid A;
取质量比为:10:12:78,由纯度高于90%GaCL2、氧化淀粉、纯净水拌制而成的水溶液100 Kg作为B液;利用国产普通化学注浆泵,A/B溶液按体积比A:B=5:1,在压力条件下,灌注入煤、岩体中,等其固化即可。 The mass ratio is: 10:12:78, 100 Kg of an aqueous solution made by mixing GaCl 2 with a purity higher than 90%, oxidized starch, and purified water is used as liquid B; using a domestic ordinary chemical grouting pump, the A/B solution is The volume ratio A:B=5:1, under pressure, pour into coal and rock mass, and wait for it to solidify.
实施例3:取固含量30%、E0级的脲醛树脂4000Kg,质量浓度为37%硅溶胶1000 Kg,置于反应釜中,加温至20度,反应10分钟,即生成聚硅溶液。作为A液; Example 3: Take 4000 Kg of urea-formaldehyde resin with a solid content of 30%, E0 grade, and a mass concentration of 37% silica sol 1000 Kg, place it in a reaction kettle, heat it to 20 degrees, and react for 10 minutes to generate a polysilicon solution. as liquid A;
取质量比为:6:8:84,由纯度高于95%GaCL2、氧化淀粉、纯净水拌制而成的水溶液100 Kg作为B液;利用国产普通化学注浆泵,A/B溶液按体积比A:B=5:1,在压力条件下,灌注入煤、岩体中,等其固化即可。 The mass ratio is: 6:8:84, 100 Kg of an aqueous solution made by mixing GaCl 2 with a purity higher than 95%, oxidized starch, and purified water is used as liquid B; using a domestic ordinary chemical grouting pump, the A/B solution is The volume ratio A:B=5:1, under pressure, pour into coal and rock mass, and wait for it to solidify.
利用国产普通化学注浆泵,A/B溶液按体积比A:B=5:1,在压力条件下,灌注入煤、岩体中,等其固化即可。 Using domestic ordinary chemical grouting pumps, the A/B solution is poured into coal and rock mass under pressure conditions according to the volume ratio A:B=5:1, and it is enough to wait for it to solidify.
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